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Steering Wheel and Steering Column Buick Enclave I

Steering Column Switches 10 illustrations ~5617 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Intermediate Steering Shaft Bolt - Lower25 N.m18 lb ft
Intermediate Steering Shaft Bolt - Upper22 N.m16 lb ft
Steering Column Bolt27 N.m20 lb ft
Steering Column Lower Support Brace Bolt10 N.m89 lb in
Steering Column Lower Trim Cover Bolt2 N.m18 lb in
Steering Column Nut27 N.m20 lb ft
Steering Column Tilt Wheel Position Sensor Bolt0.5 N.m4 lb in
Steering Wheel Bolt50 N.m37 lb ft
Turn Signal Switch Bracket Bolt9 N.m80 lb in

Fastener Tightening Specifications

Scheme 1

Scheme 1: N38
Scheme 1: N38

Diagnostic Code Index

DTCDescription
DTC B2850, B2855, B2870, or B2875DTC B2850 01 Telescope Forward Switch Circuit Short to Battery DTC B2855 01 Telescope Rearward Switch Circuit Short to Battery DTC B2870 01 Tilt Up Switch Circuit Short to Battery DTC B2875 01 Tilt Down Switch Circuit Short to Battery
DTC B2860 or B2880DTC B2860 01 Telescope Position Sensor Circuit Short to Battery DTC B2860 06 Telescope Position Sensor Circuit Short to Ground or Open DTC B2860 5A Telescope Position Sensor Circuit Plausibility Failure DTC B2860 61 Telescope Position Sensor Actuator Stuck DTC B2880 01 Tilt Position Sensor Circuit Short to Battery DTC B2880 06 Tilt Position Sensor Circuit Short to Ground or Open DTC B2880 5A Tilt Position Sensor Circuit Plausibility Failure DTC B2880 61 Tilt Position Sensor Actuator Stuck
DTC B2890DTC B2890 4B Tilt and Telescope Motor Circuit Calibration Not Learned

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach
  3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category

Diagnostic Fault Information

CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Steering Wheel Column Tilt Telescope Switch B+1, 21, 2
Steering Column Tilt Up Switch Signal11B2870 01
Steering Column Tilt Down Switch Signal11B2875 01
Steering Column Telescope Reverse Switch Signal22B2855 01
Steering Column Telescope Forward Switch Signal22B2850 01
1. Tilt Malfunction 2. Telescope Malfunction

Circuit Description

The memory seat module (MSM) receives voltage inputs from the tilt/telescope switch based on the position of the switch. The MSM then supplies battery voltage and a ground to the tilt or telescope motor control circuits depending on which direction of movement is requested.

Conditions for Running the DTC

The ignition ON.

Conditions for Setting the DTC

The MSM detects a tilt or telescope switch input for more than 30 consecutive seconds after the tilt or telescope motor movement has stopped.

Action Taken When the DTC Sets

  1. The tilt or telescope motor will be deactivated.
  2. Memory recall functions will be disabled.

Conditions for Clearing the DTC

  1. A current DTC will clear when the failed switch input is no longer active.
  2. A history DTC will clear after 100 ignition cycles.

Diagnostic Aids

An intermittently stuck tilt or telescope switch may cause a DTC to set.

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, observe the appropriate scan tool Tilt or Telescope Switch parameter while cycling the tilt/telescope switch between states. The parameter should change between Inactive and Active.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
  2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Verify the scan tool tilt switch and telescope switch parameters are Inactive. If not the specified value, test the signal circuits listed below for a short to voltage. If the circuit tests normal, replace the MSM. Tilt Up Switch terminal 2 Tilt Down Switch terminal 6 Telescope Forward Switch terminal 3 Telescope Rearward Switch terminal 5
  4. Install a 3A fused jumper wire between the signal circuits listed below and the B+ circuit terminal 1 . Verify the scan tool tilt switch and telescope switch parameters are Active. Tilt Up Switch terminal 2 Tilt Down Switch terminal 6 Telescope Forward Switch terminal 3 Telescope Rearward Switch terminal 5 If not the specified value, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
  5. If all circuit test normal, test or replace the tilt/telescope switch.

Component Testing

Tilt/Telescope Switch

  1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
  2. Test for infinite resistance between the signal terminals listed below and the B+ terminal 1 with the switch in the neutral position: Tilt Up Switch terminal 2 Tilt Down Switch terminal 6 Telescope Forward Switch terminal 3 Telescope Rearward Switch terminal 5 If less than the specified range, replace the steering column.
  3. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 2 with the switch in the TILT UP position. If greater than the specified range, replace the steering column.
  4. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 6 with the switch in the TILT DOWN position. If greater than the specified range, replace the steering column.
  5. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 5 with the switch in the TELESCOPE OUT position. If greater than the specified range, replace the steering column.
  6. Test for less than 1 ohm between the B+ terminal 1 and the signal terminal 3 with the switch in the TELESCOPE IN position. If greater than the specified range, replace the steering column.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Steering Column Tilt Wheel and Telescope Switch Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  2. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for MSM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
5-Volt ReferenceB2860 06, B2880 06B2860 06, B2880 06B2860 01, B2880 01
Steering Column Tilt Sensor SignalB2880 06B2880 06B2880 01B2880 5A
Steering Column Telescope Sensor SignalB2860 06B2860 06B2860 01B2860 5A
Steering Column Tilt Motor Control - UpB2880 61B2880 61B2880 61
Steering Column Tilt Motor Control - DownB2880 61B2880 61B2880 61
Steering Column Telescope Motor Control - ForwardB2860 61B2860 61B2860 61
Steering Column Telescope Motor Control - ReverseB2860 61B2860 61B2860 61
Low ReferenceB2860 06, B2880 06B2860 01

The memory seat module (MSM) determines the position of the steering column based on inputs received from the tilt or telescope position sensors built into the tilt or telescope actuators. The MSM supplies a 5-volt reference and a low reference to the sensors and monitors the column position via the steering column tilt or telescope sensor signal circuit.

Ignition ON

B2860 01

The steering column telescope sensor signal voltage is greater than 4.8 volts for more than 2 seconds.

B2860 06

The steering column telescope sensor signal voltage is less than 0.2 volt for more than 2 seconds.

B2860 5A

An incorrect steering column telescope sensor signal voltage is seen.

B2860 61

The steering column telescope sensor signal voltage does not change when the telescope actuator is commanded.

B2880 01

The steering column tilt sensor signal voltage is greater than 4.8 volts for more than 2 seconds.

B2880 06

The steering column tilt sensor signal voltage is less than 0.2 volt for more than 2 seconds.

B2880 5A

An incorrect steering column tilt sensor signal voltage is seen.

B2880 61

The steering column tilt sensor signal voltage does not change when the telescope actuator is commanded.

Steering column tilt operations are suspended.

  1. A current DTC will clear when the malfunction is no longer present
  2. A history DTC will clear after 50 malfunction-free ignition cycles.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Tilt Sensor and Telescope Sensor parameter. The readings should be between 0.2 and 4.8 volts. If not within the specified range, refer to Tilt/Telescope Sensor Circuit Malfunction.
  2. Command the column to tilt up and down and telescope in and out using the tilt/telescope switch. The column should move in the commanded direction. If the column does not operate as specified, refer to Tilt/Telescope Actuator Circuit Malfunction.

Telescope or Tilt Sensor Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the steering wheel tilt/telescope position sensor.
  2. Ignition OFF, test for less than 2.0 ohms between the low reference circuit terminal B and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground. If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
  4. Verify the scan tool Tilt Sensor and Telescope Sensor parameter is less than 0.2 volt. If greater than the specified range, test the signal circuits listed below for a short to voltage. If the circuit tests normal, replace the MSM. Tilt Sensor terminal A Telescope Sensor terminal D
  5. Install a 3A fused jumper wire between the signal circuits listed below and the 5-volt reference circuit terminal C. Verify the scan tool tilt sensor and telescope sensor parameter is greater than 4.8 volts. Tilt Sensor terminal A Telescope Sensor terminal D If less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
  6. If all circuits test normal, replace the steering column.

Tilt/Telescope Actuator Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the tilt/telescope actuator.
  2. Install a test lamp between the control circuit terminals listed below of the tilt/telescope motor. Tilt Up/Tilt Down terminals 1 and 2 Telescope Forward/Telescope Rearward terminals 1 and 2
  3. Command the column to tilt up and down or telescope in and out using the tilt/telescope switch. The test lamp should illuminate with each command. If the test lamp does not illuminate, test the appropriate tilt/telescope control circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the MSM.
  4. If all circuits test normal, replace the steering column.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Steering Column Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  2. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for MSM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach
  3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category

The memory seat module MSM learns tilt/telescope soft stops approximately 1.3 cm (0.5 in) from the mechanical ends of travel. The system uses soft stops to prevent wear on the system by ensuring that the steering column movement stops before it reaches its mechanical end of travel in any direction. The soft stops are initially programmed at the factory. The stop positions may be reprogrammed, which is necessary any time the MSM is replaced.

Ignition ON.

The soft stops have not been learned.

  1. The tilt and telescope motors will be deactivated.
  2. Memory recall functions will be disabled.
  1. A current DTC will clear when the soft stops have been learned.
  2. A history DTC will clear after 100 ignition cycles.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

  1. Ignition ON, perform the scan tool Learn Column Soft Stops procedure. Refer to «Telescoping Steering Column Calibration»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  2. Operate the vehicle within the Conditions for Running and Setting. Verify DTC B2890 does not reset. If the DTC resets, replace the MSM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for MSM replacement, setup, and programming

Symptoms - Steering Wheel and Column

Review the system description and operation in order to familiarize yourself with the system functions. Refer to Steering Wheel and Column Description and Operation .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the steering wheel and column.
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Symptoms List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

  1. «Steering Column Tilt/Telescoping Malfunction»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  2. «Noise in Steering Column»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column__noise-in-steering-column)
  3. «Steering Column Tilt Function Inoperative»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column__steering-column-tilt-function-inoperative)
  4. «High Shift Effort»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column__high-shift-effort)
  5. «Looseness in Steering Column»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column__looseness-in-steering-column)
  1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach
  3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category

The memory seat module (MSM) receives voltage inputs from the tilt/telescope switch based on the position of the switch. The MSM then supplies battery voltage and a ground to the tilt or telescope motor control circuits depending on which direction of movement is requested.

The MSM determines the position of the steering column based on inputs received from the telescope position sensor, built into the telescoping actuator. The MSM supplies a 5-volt reference and a low reference to the sensor and monitors the column position via the steering column telescope sensor signal circuit.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Tilt Up Switch, Tilt Down Switch, Telescope Forward Switch and Telescope Rearward Switch parameters while cycling the tilt/telescope switch between the TILT UP, TILT DOWN, TELESCOPE IN, and TELESCOPE OUT positions. The parameters should cycle between Inactive and Active. If any of the parameters do not cycle between the specified values, refer to Tilt/Telescope Switch Circuit Malfunction.
  2. Observe the scan tool Tilt Sensor and Telescope Sensor parameter. The readings should be between 0.2 and 4.8 volts. If not within the specified range, refer to Tilt/Telescope Sensor Circuit Malfunction.
  3. Command the column to tilt up and down and telescope in and out using the tilt/telescope switch. The column should move in the commanded direction. If the column does not operate as specified, refer to Tilt/Telescope Actuator Circuit Malfunction.

Tilt/Telescope Switch Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
  2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Verify the scan tool tilt switch and telescope switch parameters are Inactive. If not the specified value, test the signal circuit listed below for a short to voltage. If the circuit tests normal, replace the MSM. Tilt Up Switch terminal 2 Tilt Down Switch terminal 6 Telescope Forward Switch terminal 3 Telescope Rearward Switch terminal 5
  4. Install a 3A fused jumper wire between the signal circuit listed below and the B+ circuit terminal 1. Verify the scan tool tilt switch and telescope switch parameters are Active. Tilt Up Switch terminal 2 Tilt Down Switch terminal 6 Telescope Forward Switch terminal 3 Telescope Rearward Switch terminal 5 If not the specified value, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
  5. If all circuit test normal, test or replace the tilt/telescope switch.

Tilt/Telescope Sensor Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the steering wheel tilt/telescope position sensor.
  2. Ignition OFF, test for less than 2.0 ohms between the low reference circuit terminal B and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground. If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM.
  4. Verify the scan tool tilt sensor and telescope sensor parameter is less than 0.2 volts. If greater than the specified range, test the signal circuit listed below for a short to voltage. If the circuit tests normal, replace the MSM. Tilt Sensor terminal A Telescope Sensor terminal D
  5. Install a 3A fused jumper wire between the signal circuit listed below and the 5-volt reference circuit terminal C. Verify the scan tool tilt sensor and telescope sensor parameter is greater than 4.8 volts. Tilt Sensor terminal A Telescope Sensor terminal D If less than the specified range, test the appropriate signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
  6. If all circuits test normal, replace the steering column.

Tilt/Telescope Actuator Circuit Malfunction

  1. Ignition OFF, disconnect the harness connector at the tilt/telescope actuator.
  2. Install a test lamp between the control circuit terminals listed below of the tilt/telescope motor. Tilt Up/Tilt Down terminals 1 and 2 Telescope Forward/Telescope Rearward terminals 1 and 2
  3. Command the column to tilt up and down or telescope in and out using the tilt/telescope switch. The test lamp should illuminate with each command. If the test lamp does not illuminate, test the appropriate tilt/telescope control circuits for a short to ground or an open/high resistance. If the circuits test normal, replace the MSM.
  4. If all circuits test normal, replace the steering column.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Steering Column Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  2. «Steering Column Tilt Wheel and Telescope Switch Replacement»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column)
  3. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for MSM replacement, setup, and programming

Steering Column Tilt Function Inoperative

StepActionYesNo
1Did you review the Steering Wheel and Column Description and Operation and perform the necessary inspections?Go to Step 2Go to Symptoms - Steering Wheel and Column
2Verify that the steering column tilt function is inoperative. Does the steering column tilt function operate normally?System OKGo to Step 3
3If equipped, verify that the following components are not seized or corroded: Tilt pivot pins Tilt head lock shoes Are the components seized or corroded?Go to Step 7Go to Step 4
4Inspect the tilt pivot pins for binding. Are the tilt pivot pins binding?Go to Step 8Go to Step 5
5Inspect for a weak or broken steering column tilt spring. Is the steering column tilt spring weak or broken?Go to Step 9Go to Step 6
6Inspect the steering column wiring harness routing for tightness. Was the steering column wiring harness routed correctly?Go to Step 11Go to Step 10
7Replace the steering column. Refer to Steering Column Replacement . Did you complete the repair?Go to Step 11
8If serviceable, replace the pivot pins. If not serviceable replace the steering column. Refer to Steering Column Replacement . Did you complete the repair?Go to Step 11
9If serviceable, replace the tilt spring. Did you complete the repair?Go to Step 11
10Route the steering column wiring harness to the correct location. Did you correctly route the wiring harness?Go to Step 11
11Operate the steering column tilt function in order to verify the repair. Did you correct the condition?System OKGo to Step 3

Steering Column Tilt Function Inoperative

Noise in Steering Column

StepActionYesNo
1Did you review the Steering Wheel and Column Description and Operation and perform the necessary inspections?Go to Step 2Go to Symptoms - Steering Wheel and Column
2Verify that noise is present in the steering column during operation. Is noise present in the steering column during operation?Go to Step 3System OK
3Inspect the steering column mounting features for the following conditions: The steering column mounting fasteners are loose. The steering column mounting features are sheared. Are the steering column mounting features loose?Go to Step 9Go to Step 4
4Inspect the SIR/SRS coil for noise. Is the SIR/SRS coil noisy?Go to Step 10Go to Step 5
5If equipped, inspect the lock plate retaining ring for correct installation. Is the lock plate retaining ring installed incorrectly?Go to Step 11Go to Step 6
6Inspect the steering column upper and lower bearings for the following conditions: Damage Lubrication Wear Proper seating Are the bearings in need of repair or replacement?Go to Step 12Go to Step 7
7Does the tilt joint need to be lubricated?Go to Step 13Go to Step 8
8NOTE: Inspect the intermediate shaft for noise while driving the vehicle, turning the steering wheel, and applying the brakes. Inspect the intermediate shaft for noise.Is the intermediate shaft noisy?Go to Step 14Go to Step 15
9NOTE: If the steering column mounting feature is damaged or sheared, replace the steering column. Refer to Steering Column Replacement . Tighten the steering column mounting fastener to specifications. Refer to Fastener Tightening Specifications .Did you complete the repair?Go to Step 15
10Replace the SIR/SRS coil. Refer to Steering Wheel Airbag Coil Replacement . Did you complete the repair?Go to Step 15
11Install the lock plate retaining ring correctly. Did you complete the repair?Go to Step 15
12NOTE: If the steering column upper and/or lower bearings are not serviceable, replace the steering column. Refer to Steering Column Replacement . Replace the upper and/or lower bearings, if serviceable.Did you complete the replacement?Go to Step 15
13Lubricate the tilt joint. Did you complete the repair?Go to Step 15
14Replace the appropriate steering intermediate shaft component. Did you complete the repair?Go to Step 15
15Operate the system in order to verify the repair. Did you correct the condition?System OKGo to Step 3
NOTE
Inspect the intermediate shaft for noise while driving the vehicle, turning the steering wheel, and applying the brakes.
NOTE
If the steering column mounting feature is damaged or sheared, replace the steering column. Refer to Steering Column Replacement .
NOTE
If the steering column upper and/or lower bearings are not serviceable, replace the steering column. Refer to Steering Column Replacement .

Noise in Steering Column

High Shift Effort

StepActionYesNo
DEFINITION: Abnormally high shift effort is required to shift the transmission out of the Park (P) position.
1Did you review the Steering Wheel and Column Description and Operation?Go to Step 2Go to Steering Wheel and Column Description and Operation
2Verify that a high column shift effort is required in order to shift out of the PARK position. Does the column shifter operate normally?System OKGo to Step 3
3Inspect for worn or worn or damaged automatic transmission range selector shift cable. Is the transmission range selector shift cable worn or damaged?Go to Step 6Go to Step 4
4Inspect the automatic transmission range selector shift cable for binding or mis-adjustment. Is the automatic transmission range selector shift cable binding or mis-adjusted?Go to Step 7Go to Step 5
5Inspect the column linear shift assembly for damage. Is the column linear shift assembly damaged?Go to Step 8Go to Step 9
6Replace the automatic transmission range selector shift cable. Did you complete the repair?Go to Step 9
7Adjust the automatic transmission range selector shift cable. Did you complete the repair?Go to Step 9
8IMPORTANT: If the column linear shift assembly is not serviceable, then the steering column will need to be replaced. Refer to Steering Column Replacement . Replace the column linear shift assembly, if serviceable.Did you complete the replacement?Go to Step 9
9Operate the system in order to verify the repair. Did you correct the condition?System OKGo to Step 3
IMPORTANT
If the column linear shift assembly is not serviceable, then the steering column will need to be replaced. Refer to Steering Column Replacement .

High Shift Effort

Looseness in Steering Column

StepActionYesNo
1Did you review the Steering Wheel and Column Description and Operation and perform the necessary inspections?Go to Step 2Go to Symptoms - Steering Wheel and Column
2Verify that the steering column is loose. Is the steering column loose?Go to Step 3System OK
3Inspect the steering column mounting features for the following conditions. The steering column mounting fasteners are loose. The steering column mounting features are sheared. Are the steering column mounting features loose?Go to Step 5Go to Step 4
4Inspect the upper and/or lower bearings for looseness. Are any of the bearings worn or loose?Go to Step 6Go to Step 7
5NOTE: If the steering column mounting feature is damaged or sheared, replace the steering column. Refer to Steering Column Replacement . Tighten the steering column mounting fastener to specifications. Refer to Fastener Tightening Specifications .Did you complete the repair?Go to Step 7
6NOTE: If the steering column upper and/or lower bearings are not serviceable, replace the steering column. Refer to Steering Column Replacement . Replace the upper and/or lower bearings, if serviceable.Did you complete the repair?Go to Step 7
7Operate the steering column in order to verify the repair. Did you correct the condition?System OKGo to Step 3
NOTE
If the steering column mounting feature is damaged or sheared, replace the steering column. Refer to Steering Column Replacement .
NOTE
If the steering column upper and/or lower bearings are not serviceable, replace the steering column. Refer to Steering Column Replacement .

Looseness in Steering Column

Removal Procedure

  1. Turn the steering wheel to the straight forward position and lock the steering column.
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  3. Remove the left front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/enclave/i-2007-2013/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  4. Disengage the intermediate steering shaft boot from the steering gear and from the intermediate steering shaft upper seal.
  5. Remove the intermediate steering shaft bolt (1) at the steering gear.
  6. Disconnect the intermediate steering shaft from the steering gear.
  7. Remove the intermediate steering shaft boot (1).

Installation Procedure

  1. Install the intermediate steering shaft boot (1).
  2. Connect the intermediate steering shaft to the steering gear. Install the intermediate steering shaft bolt (1) and tighten to 25 N.m (18 lb ft).
  3. Install the intermediate steering shaft boot to the steering gear and to the intermediate steering shaft upper seal.
  4. Install the left front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/buick/enclave/i-2007-2013/remont/wheel-tire-system/#tires-and-wheels__tire-and-wheel-removal-and-installation) .
  5. Lower the vehicle.
  1. Turn the steering wheel to the straight forward position and lock the steering column.
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#general-information__lifting-and-jacking-the-vehicle) .
  3. Disengage the intermediate steering shaft boot from the steering gear and from the intermediate steering shaft upper seal.
  4. Remove the intermediate steering shaft bolt (1) at the steering gear.
  5. Disconnect the intermediate steering shaft from the steering gear.
  6. Remove the left side instrument panel insulator panel. Refer to «Instrument Panel Insulator Panel Replacement - Left Side (Enclave)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Acadia)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  7. Remove the intermediate steering shaft bolt (1) at the steering column.
  8. Disconnect the intermediate steering shaft (2) from the steering column shaft.
  9. Disconnect the intermediate steering shaft upper seal (3) from the dash panel.
  10. Remove the intermediate steering shaft from the vehicle.
  1. Position the intermediate steering shaft (2) in the vehicle.
  2. Connect the intermediate steering shaft to the steering column shaft.
  3. Install the intermediate steering shaft bolt (1), and tighten to 22 N.m (16 lb ft).
  4. Connect the intermediate steering shaft upper seal (3) to the dash panel.
  5. Install the left side instrument panel insulator panel. Refer to «Instrument Panel Insulator Panel Replacement - Left Side (Enclave)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Acadia)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  6. Connect the intermediate steering shaft to the steering gear. Install the intermediate steering shaft bolt (1) and tighten to 25 N.m (18 lb ft).
  7. Install the intermediate steering shaft boot to the steering gear and to the intermediate steering shaft upper seal.
  8. Lower the vehicle.

Inspection Procedure

  1. Inspect the capsules on the steering column bracket assembly. Verify that the capsules are seated securely in the bracket slots and inspect the capsules for any loose conditions when pushed or pulled by hand. If the capsules are not secure, perform one of the following procedures: If the bracket is bolted to the jacket assembly, replace the bracket. If the bracket is welded to the jacket assembly, replace the jacket assembly.
  2. Inspect the jacket assembly for collapse by measuring the distance from the lower edge of the upper jacket to a defined point on the lower jacket. If measured dimensions (A), are not within specifications (100 mm), install a steering column.

Scheme 2

Scheme 2: Steering Column Upper Trim Cover Replacement
Scheme 2: Steering Column Upper Trim Cover Replacement
CalloutComponent Name
1Steering Column Upper Trim Cover Procedure Pull the tilt lever down to move the steering wheel down and out to clear the steering column housing cover. Use a flat-bladed plastic trim tool in order to release the tabs securing the steering column upper trim cover to the lower trim cover.

Steering Column Upper Trim Cover Replacement

Scheme 3

Scheme 3: Steering Column Lower Trim Cover Replacement
Scheme 3: Steering Column Lower Trim Cover Replacement
CalloutComponent Name
Preliminary Procedure Remove the ignition lock cylinder opening trim cover bolts. Refer to Ignition Lock Cylinder Opening Trim Cover Replacement .
1Steering Column Lower Trim Cover Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 2 N.m (18 lb in)
2Steering Column Lower Trim Cover Procedure Unclip the steering column lower trim cover from the ignition lock cylinder opening trim cover. Separate the steering column lower trim cover from the steering column upper trim cover.
CAUTION
Refer to Fastener Caution .

Steering Column Lower Trim Cover Replacement

Tilt/Telescoping Soft Stops

After replacement of the memory seat module (MSM), it is necessary to program the tilt/telescoping soft stops. Each soft stop is a programmable end of travel that is set approximately 1.3 cm (0.5 in) from the mechanical end of travel. The steering column has a soft stop set at each end of the telescoping in/out and tilt up/down movement. The system uses soft stops to prevent wear on the system by ensuring that the steering column movement stops before it reaches its mechanical end of travel in any direction. The soft stops are initially programmed at the factory. The stop positions may be reprogrammed, which is necessary any time the MSM, the tilt actuator or telescope actuators replaced, as described in the following procedure.

Tilt/Telescoping Soft Stop Programming Procedure

  1. Turn ON the ignition, with the engine OFF.
  2. Connect a scan tool to the vehicle.
  3. Select Model Year.
  4. Select LD Truck.
  5. Select Buick.
  6. Product Line (R).
  7. Select Body.
  8. Select Memory Seat
  9. Select Special Functions
  10. Select Driver Seat.
  11. Select Learn Column Soft Stops.
  12. Follow the scan tool on-screen instructions.

Scheme 4

Scheme 4: Turn Signal Switch Bracket Replacement
Scheme 4: Turn Signal Switch Bracket Replacement
CalloutComponent Name
Preliminary Procedure Remove the inflatable restraint steering wheel module coil. Refer to Steering Wheel Airbag Coil Replacement .
1Turn Signal Switch Bracket Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 9 N.m (80 lb in)
2Turn Signal Switch Bracket Procedure Disconnect any electrical connectors as needed. Release the plastic retaining tabs to release the turn signal switch bracket from the steering column.
CAUTION
Refer to Fastener Caution .

Turn Signal Switch Bracket Replacement

Scheme 5

Scheme 5: Turn Signal Multifunction Switch Replacement
Scheme 5: Turn Signal Multifunction Switch Replacement
CalloutComponent Name
Preliminary Procedures Remove the steering column upper trim cover. Refer to Steering Column Upper Trim Cover Replacement . Remove the steering column lower trim cover. Refer to Steering Column Lower Trim Cover Replacement .
1Turn Signal Multifunction Switch Procedure Disconnect any electrical connectors as needed. Release the plastic retaining tabs.

Turn Signal Multifunction Switch Replacement

Scheme 6

Scheme 6: Steering Wheel Replacement
Scheme 6: Steering Wheel Replacement
CalloutComponent Name
Preliminary Procedure Remove the inflatable restraint steering wheel module. Refer to Steering Wheel Inflatable Restraint Module Replacement .
1Steering Wheel Bolt CAUTION: Refer to Fastener Caution . Tighten 50 N.m (37 lb ft)
2Steering Wheel Procedure Disconnect all electrical connectors as needed. Remove the steering wheel.
CAUTION
Refer to Fastener Caution .

Steering Wheel Replacement

Scheme 7

Scheme 7: Steering Column Tilt Wheel and Telescope Switch Replacement
Scheme 7: Steering Column Tilt Wheel and Telescope Switch Replacement
CalloutComponent Name
Preliminary Procedure Remove the steering column lower trim cover. Refer to Steering Column Lower Trim Cover Replacement .
1Steering Column Tilt Wheel and Telescope Switch Procedure Disconnect any electrical connectors as needed. Release the plastic retaining tabs to release the switch from the turn signal switch bracket.

Steering Column Tilt Wheel and Telescope Switch Replacement

Scheme 8

Scheme 8: Steering Column Tilt Wheel Position Sensor Replacement
Scheme 8: Steering Column Tilt Wheel Position Sensor Replacement
CalloutComponent Name
Preliminary Procedure Remove the steering column. Refer to Steering Column Replacement .
1Steering Column Tilt Wheel Position Sensor Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 0.5 N.m (4 lb in)
2Steering Column Tilt Wheel Position Sensor CAUTION: Cover any openings on the steering column while servicing the motor. Do not allow anything to drop into the openings on the steering column. Objects or contaminants in the openings on the steering column could damage the steering column. This damage could impair the collapsible design of the steering column. Procedure Disconnect any electrical connectors as necessary. If necessary, reposition the steering column tilt wheel actuator motor. If necessary, reposition the steering column telescope actuator motor. During the installation, align the position sensor arms with both actuator motors. After the installation is complete, perform the telescoping steering column calibration. Refer to Telescoping Steering Column Calibration . TIP: The connectors on the harness are for a single use only. If you disconnect either connector or both connectors, replace the harness.
CAUTION
Refer to Fastener Caution .
CAUTION
Cover any openings on the steering column while servicing the motor. Do not allow anything to drop into the openings on the steering column. Objects or contaminants in the openings on the steering column could damage the steering column. This damage could impair the collapsible design of the steering column.

Steering Column Tilt Wheel Position Sensor Replacement

  1. Turn the steering wheel to the straight forward position and lock the steering column.
  2. Remove the left side instrument panel (I/P) insulator panel. Refer to «Instrument Panel Insulator Panel Replacement - Left Side (Enclave)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Acadia)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  3. Remove the driver knee bolster. Refer to «Driver Knee Bolster Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Driver Knee Bolster Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Driver Knee Bolster Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  4. Remove the I/P cluster trim plate applique for Buick. Refer to «Instrument Panel Cluster Trim Plate Applique Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  5. Remove the I/P Instrument Cluster Trim Plate for GMC and Chevrolet. Refer to «Instrument Panel Cluster Trim Plate Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Cluster Trim Plate Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  6. Remove the steering column housing cover bolts. Refer to «Steering Column Housing Cover Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  7. Disconnect all electrical connectors as necessary.
  8. If equipped, remove the steering column lower support brace bolts (1) and the steering column lower support brace (2).
  9. Remove the upper intermediate steering shaft bolt (1).
  10. Disconnect the upper intermediate steering shaft (2) from the steering column. Do not pull the intermediate steering shaft lower seal (3) away from the body panel.
  11. Remove the steering column nuts (2) and the steering column bolts (1).
  12. Remove the steering column from the vehicle.
  13. Transfer any parts as necessary.
  1. Install the steering column to the vehicle and start the steering column nuts (3, 4) and bolts (1, 2) by hand using the following sequence: Position the steering column in the vehicle. Hand start the steering column nuts (3, 4). Hand start the steering column bolts (1, 2). Hold the steering column flush against the I/P carrier. Hand tighten steering column nut (3). Hand tighten steering column nut (4). Hand tighten steering column bolt (1). Hand tighten steering column bolt (2).
  2. Tighten the steering column nuts (3, 4) and bolts (1, 2) in the following sequence: Tighten steering column nut (3) to 27 N.m (20 lb ft). Tighten steering column nut (4) to 27 N.m (20 lb ft). Tighten steering column bolt (1) to 27 N.m (20 lb ft). Tighten steering column bolt (2) to 27 N.m (20 lb ft).
  3. Connect the intermediate steering shaft (2) to the steering column shaft.
  4. Install the intermediate steering shaft bolt (1) and tighten to 22 N.m (16 lb ft).
  5. Ensure the intermediate steering shaft upper seal (3) is seated correctly.
  6. If equipped, install the steering column lower support brace (2) and the steering column lower support brace bolts (1) and tighten to 10 N.m (89 lb in).
  7. Connect all electrical connectors as necessary.
  8. Install the steering column housing cover bolts. Refer to «Steering Column Housing Cover Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  9. Install the I/P Instrument Cluster Trim Plate for GMC and Chevrolet. Refer to «Instrument Panel Cluster Trim Plate Replacement (Acadia)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Cluster Trim Plate Replacement (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  10. Install the I/P cluster trim plate applique for Buick. Refer to «Instrument Panel Cluster Trim Plate Applique Replacement (Enclave)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  11. Install the left side I/P insulator panel. Refer to «Instrument Panel Insulator Panel Replacement - Left Side (Enclave)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Acadia)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) , «Instrument Panel Insulator Panel Replacement - Left Side (Traverse)»(/buick/enclave/i-2007-2013/remont/exteriorinterior-trim/#instrument-panel-trim-and-console-trim) .
  12. If equipped with a power tilting and telescoping steering column, calibrate the telescoping steering column. Refer to «Telescoping Steering Column Calibration»(/buick/enclave/i-2007-2013/remont/steering-column-switches/#steering-wheel-and-steering-column) .

Scheme 9

Scheme 9: Steering Angle Sensor Replacement
Scheme 9: Steering Angle Sensor Replacement
CalloutComponent Name
Preliminary Procedure Remove the inflatable restraint steering wheel module coil. Refer to Steering Wheel Airbag Coil Replacement .
1Steering Angle Sensor Procedure Disconnect any electrical connectors as needed. Squeeze the plastic retaining tabs on the supplemental inflatable restraint steering wheel module coil to release and disengage the steering angle sensor. After installation, center the steering angle sensor. Refer to Steering Angle Sensor Centering .

Steering Angle Sensor Replacement

Steering Wheel and Column Description and Operation

The steering wheel and column has 4 primary functions

  1. Vehicle steering
  2. Vehicle security
  3. Driver convenience
  4. Driver safety

Vehicle Steering

The steering wheel is the first link between the driver and the vehicle. The steering wheel is fastened to a steering shaft within the column. At the lower end of the column, the intermediate shaft connects the column to the steering gear.

Vehicle Security, found on Some Vehicle Models

Theft deterrent components are mounted and designed into the steering column. The following components allow the column to be locked in order to minimize theft

  1. The ignition switch
  2. The steering column lock
  3. The ignition cylinder

Driver Convenience

The steering wheel and column may also have driver controls attached for convenience and comfort. The following controls may be mounted on or near the steering wheel or column.

  1. The turn signal switch
  2. The hazard switch
  3. The headlamp dimmer switch
  4. The wiper/washer switch
  5. The horn pad/cruise control switch
  6. The redundant radio/entertainment system controls
  7. The tilt or tilt/telescoping functions
  8. The navigation/OnStar® features
  9. The HVAC controls

Driver Safety

The energy-absorbing steering column compresses in the event of a front-end collision, which reduces the chance of injury to the driver. The mounting capsules break away from the mounting bracket in the event of an accident.

Ignition Lock Cylinder Control Actuator

If the vehicle is equipped with a floor mounted console gear shift, it has a ignition lock cylinder control actuator system in the steering column. The ignition lock cylinder control actuator's purpose is to prevent the ignition key from being turned to the OFF position when the transmission is in gear and the vehicle may still be moving.The column ignition lock system consists of a ignition lock cylinder control actuator , and a park position switch that is located in the A/T shift lock control switch. The ignition lock cylinder control actuator contains a pin that is spring loaded out to mechanically prevent the ignition key cylinder from being turned to the lock position when the vehicle transmission is not in the Park position. If vehicle power is lost, and/or the transmission is not in the Park position the operator will not be able to turn the ignition key to the lock position and will not be able to remove the ignition key from the column.

Tilt/Telescoping Switch Operation

The tilt/telescoping steering column has a four-position switch which may be used to adjust the position of the steering wheel in or out which is telescope and up or down which is tilt. The position of the column may be changed as follows

  1. Press the switch up to tilt the column up.
  2. Press the switch down to tilt the column down.
  3. Press the switch forward and the column moves toward the front of the vehicle.
  4. Press the switch rearward and the column moves toward the rear of the vehicle.

The memory seat module (MSM) receives inputs from the tilt/telescope switch to manually move the column to a desired position. Pressing the control switch sends an input to the MSM. The MSM receives an input and actuates the corresponding column motor.

Pressing the switch momentarily in either the UP or DOWN, or IN or OUT position, and releasing within 0.5 seconds, causes the column to advance slightly in the corresponding direction then stop. This feature allows fine control of the steering column position in each direction. If the switch is pressed and held for longer than 0.5 seconds, the column advances slightly in that direction, pauses, then resumes movement as long as the switch is held.

Motors

Both the tilt and telescoping motors are reversible. For example, the tilt motor moves the column both up and down. When the MSM receives an input to move the column up, the MSM supplies battery positive voltage and ground to the tilt motor in order to move the column up. When the MSM receives a column down input, the MSM supplies battery positive voltage and ground to the same motor, but with a reverse polarity. When the voltage polarity is reversed, the motor runs in the opposite direction and moves the column down.

Position Sensors

Two position sensors are used by the MSM to store column positions in memory and to return the column to the stored memory positions. The MSM provides a 5-volt reference voltage and a ground to both the tilt and telescoping position sensors. The sensor feedback circuit voltage varies from 0.25-4.75 volts. Each sensor is mounted to its corresponding motor cable assembly. When the motor rotates its cable, the resistance of the sensor varies. The MSM monitors the feedback voltage to determine the column position via the tilt and telescoping position sensor input circuits. When an entry or exit position is saved, the MSM stores the column positions by recording each position sensor's feedback voltage. When an entry or exit position is commanded, the module moves the motors until all the position sensor feedback voltages equal the feedback voltages stored in memory.

Tilt/Telescoping Memory

Memory settings and the personalization of steering wheel positions are available with the tilt/telescoping steering column. The data stored consists of entry positions and exit positions. The entry position is the position that the steering column moves in when the ignition is turned ON. The exit position is the direction that the steering column moves in when the ignition is turned OFF and the driver's door is opened.

An initial memory setting is set in the MSM at the assembly plant. This setting may be changed to suit the customer at the time of purchase or at anytime in the future.

Entry/Exit Personalization

The MSM stores personalization information. The driver information center (DIC) is used to enable and disable the personalization feature in the MSM. A serial data message is sent to the MSM, by the DIC, which specifies that the MSM enable the personalization feature until disabled again using the DIC.

The memory seat module can store 6 possible positions: 3 entry positions and 3 exit positions.

  1. Driver 1 exit position, set using the memory switches
  2. Driver 2 exit position, set using the memory switches
  3. Default exit position which is all forward, all up, with no memory position set
  4. Driver 1 entry position, set using the memory switches
  5. Driver 2 entry position, set using the memory switches
  6. Last known driver entry position which is when the ignition is turned ON by an unknown driver

Memory Setting

When the driver door switch assembly (DDSA) receives inputs from the memory function switch, the steering column personalization positions may be recorded for one or two different drivers. Once a steering column driving entry or exit position is adjusted by the driver it must be set in memory. To record a position, the driver must press the SET MEMORY button, which is followed by a chime to acknowledge that input. Within 5 seconds, either the MEMORY 1 or MEMORY 2 button must be pressed. When the DDM receives these inputs, it sends a serial data message to the MSM. The MSM records the feedback voltages from the column position sensors for that driver. A single chime is sounded to acknowledge that the position was recorded.

To record a second position, the second driver must press the SET MEMORY 2 button, after they have made the appropriate adjustments, and the process continued.

Memory Personalization Recall

When the driver presses the MEMORY 1 or MEMORY 2 button, the DDSA receives the input and a single chime is sounded. The DDSA sends a serial data message to the MSM indicating which driver memory setting has been selected. The MSM applies both battery positive voltage and ground to the column motors until all the column position sensor feedback voltages equal the feedback voltages stored in memory for the appropriate driver.

When a keyless entry transmitter is used to unlock the vehicle doors, the remote function actuator (RFA) module communicates which driver key fob performed that command. The MSM receives the unlock command via a serial data message from the RFA module.

Special Tools

Illustration Tool Number/ Description J 1859-A Steering Wheel Puller J 42578 Steering Wheel Puller Legs

Scheme 10

Scheme 10: Special Tools
Scheme 10: Special Tools

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Steering Wheel Airbag Coil Replacement
• Lifting and Jacking the Vehicle
• Tire and Wheel Removal and Installation
• Fastener Caution
• Instrument Panel Insulator Panel Replacement - Left Side (Enclave)
• Ignition Lock Cylinder Opening Trim Cover Replacement
• Steering Angle Sensor Centering
• DTC B2850, B2855, B2870, or B2875
• Steering Wheel and Column Description and Operation
• Noise in Steering Column
• Steering Column Tilt Function Inoperative
• High Shift Effort
• Looseness in Steering Column
• Symptoms - Steering Wheel and Column
• Fastener Tightening Specifications